La Jolla Weather in September: Temperature, Precipitation, Wind
La Jolla, United States in September experiences a mild Mediterranean climate characterized by warm days and cool nights. The average temperature hovers around 20.6°C (69.0°F), with daytime highs reaching 24.3°C (75.7°F) and nighttime lows dipping to 17.7°C (63.8°F). Residents and visitors alike enjoy comfortable conditions throughout the month.
Humidity levels in La Jolla during September remain relatively high, averaging 75.4%. The coastal location contributes to the elevated moisture content in the air. Precipitation is minimal, with an average of only 0.05 mm of rainfall throughout the month. Rain occurs on approximately 5 days, covering a mere 1.4% of the time.
Wind patterns in La Jolla during September feature moderate breezes. Average wind speeds measure 17.4 km/h (10.8 mph), with gusts reaching up to 30.7 km/h (19.1 mph). The consistent ocean breeze helps maintain comfortable temperatures and provides relief from the warmth of the day.
Cloud cover in September averages 62.9%, resulting in partly cloudy conditions for much of the month. The most common weather condition observed is “partly-cloudy-day.” Despite the cloud presence, visibility remains excellent at 14.8 km (9.2 miles), allowing for clear views of the picturesque coastline and popular attractions like La Jolla Cove and Torrey Pines State Natural Reserve.
UV index levels in September average 6.9, indicating high UV radiation. Visitors to La Jolla’s beaches, including the famous La Jolla Shores, should take precautions to protect their skin from the strong California sun. The average sunrise occurs at 6:32:59 AM, while sunset takes place at 6:54:47 PM, providing ample daylight hours for outdoor activities.
Atmospheric pressure in La Jolla during September averages 1013.8 hPa, contributing to the stable weather patterns observed throughout the month. The risk of severe weather remains low, with an average severe risk rating of 10.0.
What is the temperature in La Jolla in September?
Average air temperature in La Jolla is 20.6°C (69°F) in September. The outside temperature in La Jolla feels like 20.6°C (69.1°F) on a typical September day. The highest average temperature during sunny days is 24.3°C (75.7°F) and feels like 24.3°C (75.8°F). The lowest average temperature after dark is 17.7°C (63.8°F) which feels like 17.7°C (63.8°F).
How hot is La Jolla in September?
The hot temperature in September in La Jolla rises to 30.9°C (87.6°F) on sunny days with low cloud coverage and 75.4% humidity. During hottest days of September it feels like 31.6 °C (88.9°F). The average maximum temp in La Jolla is 24.3°C (88.9°F) during day time in September.
How cold is La Jolla in September?
The coldest temp in La Jolla in September drops to 13.5°C (56.3°F) during the cold nights. With 17.4km/h (10.8mph) winds and 75.4% humidity it feels like 13.5°C (56.3°F) on the coldest nights. The average minimum temperature is 17.7°C (63.8°F) during night time in September.
Does it rain in La Jolla in September?
Yes, it rains for 5 days in La Jolla, United States in September averaging 0.05 mm of precipitation. La Jolla has a 16.7% chance for rain throughout the entire month of September.
How much does it rain in La Jolla throughout September?
La Jolla has 0.05 mm (0 inch) of rain per day on average in September. It rains for an average of 5 days out of the entire month.
Is La Jolla windy in September?
The average speed of wind in La Jolla, United States during September is 17.4km/h (10.8mph) and average windgust is 30.7km/h (19.1mph). On some days in September wind can reach up to 22.3km/h (13.9mph).
What is the direction of the wind in La Jolla in September?
Most days of September the wind is blowing from West-Northwest direction in La Jolla.
What are the humidity levels in La Jolla in September?
The average humidity levels in La Jolla in September are 75.4%. Daily humidity levels in La Jolla range from 60.1% to 82% during September.
How many hours of daylight are in La Jolla in September?
La Jolla has 12 hours 21 minutes of daylight in September on average. Sunset and sunrise times gradually change throughout the month. Sunrise in La Jolla in September is at 6:32:59 and the sunset is at 18:54:47.
What is the cloud coverage in La Jolla in September?
Clouds cover 62.9% of the sky on average throughout September in La Jolla. The cloud coverage ranges from 13.1% to 100% depending on the day of the month.
What is the UV level in September in La Jolla?
The average UV index in La Jolla is 6.9 in September. UV levels change throughout the month and range from 3 to 9.
What is the solar radiation in La Jolla in September?
The average solar radiation is 171.4 W/m2 (Watts per square meter) in La Jolla during September. However solar radiation levels change throughout the month and range from 62.5 W/m2 to 254.4 W/m2.
What is the solar energy during September in La Jolla?
The average solar energy during September in La Jolla is 14.8 MJ/m2 (megajoules per square metre). Solar energy ranges from 5.3 MJ/m2, to 22.1 MJ/m2 during September.
Are there severe weather risks in La Jolla in September?
Yes, there is a 10% risk for severe weather in La Jolla, United States in September.
What is the air pressure in La Jolla in September?
On average the air pressure in La Jolla in September is 1013.8 mb (millibars). Throughout the month the sea level pressure ranges from 1011.1 mb to 1016.7 mb.
What is the visibility in La Jolla in September?
The average daylight visibility in La Jolla in September is 14.8 km (9.2 miles). Depending on the precipitation the visibility ranges from 11.6 km (7.2 miles) to 16 km (9.9 miles) throughout September.
What is the dew point in La Jolla in September?
The average dew point in La Jolla during September is 15.9°C (60.6°F).
Where is the data for La Jolla climate in September coming from?
The climate data for La Jolla, California, United States in September is collected from the following weather stations.
- SAN DIEGO INTERNATIONAL AIRPORT, CA US
- SAN DIEGO MONTGOMERY FIELD, CA US
- SAN DIEGO MIRAMAR NAS, CA US
- Torrey Pines CA US CIMIS
- DW3101 Torrey Pines Reserve CA US SGXWFO
- KMYF
- KNKX
- SAN DIEGO/LINDBE, CA